Capital Recovery System / Very rude and threatening

I received a phone call that I owed money from a couple years ago. I have been making payments monthly on the debt and missed a few months due to circumstances beyond my control. I got the call from capital recovery systems that I owe this money about $600. I tried to set up a payment with them, to make a least $50 per months to pay off the debt, because I things are really tough with one income. The gentleman was very irritable and hang up on me, now threatens to pursue my assests and taking money from my paycheck.